tree d1c9883261f9b7f0bf44edf94d04956fb3665df0
parent e17fde96303e417934e6634db42c0b6fa3d466bc
author Alison Maher <almaher@microsoft.com> 1630020866 -0700
committer Blink WPT Bot <blink-w3c-test-autoroller@chromium.org> 1630021574 -0700

[LayoutNG] Add virtual test suite for flex fragmentation support

We currently fall back to legacy layout when encountering a flexbox
inside a multicol. That logic was updated to skip the fallback if
LayoutNGFlexFragmentation is enabled.

This CL also adds a virtual test suite for LayoutNGFlexFragmentation.
Because the implementation is not yet in place, relevant tests crash
as a result (see the updated TestExpectations).

Flexbox related tests in fast/multicol were moved to fast/multicol/flexbox
to scope the test suite down and avoid repetition with the
layout_ng_block_frag virtual test suite.

Additionally, multicol related tests in external/wpt/css/css-flexbox
were moved to external/wpt/css/css-break/flexbox for similar reasons.

There is one test in external/wpt/css/css-multicol that will now crash
with LayoutNGFlexFragmentation enabled: multicol-span-all-005.html.
However, since that test is failing in general, and no other relevant
tests existed in external/wpt/css/css-multicol, that directory was not
included in the layout_ng_flex_frag test suite.

Bug: 660611
Change-Id: I30b89471195f073b9e661e123db744e7132bb124
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3120327
Reviewed-by: Morten Stenshorne <mstensho@chromium.org>
Reviewed-by: Ian Kilpatrick <ikilpatrick@chromium.org>
Commit-Queue: Ian Kilpatrick <ikilpatrick@chromium.org>
Cr-Commit-Position: refs/heads/main@{#915762}